October 23 – November 21 · Water

Scorpio birthstones

Scorpio carries Topaz and Obsidian in the zodiac tradition.

Topaz

Composition Aluminium fluorosilicate (Al₂SiO₄(F,OH)₂)
Hardness · System 8 · Orthorhombic

Nearly all blue topaz on the market began as colourless stone, irradiated and heated to produce the colour.

Traditionally linked to confidence, clear intention and honest self-assessment.

Obsidian

Composition Volcanic glass — silica-rich lava cooled too fast to crystallise
Hardness · System 5–5.5 · Amorphous

Fractures to an edge only nanometres thick — sharper than surgical steel, and still used in some specialist scalpels.

Traditionally associated with protection, boundaries and honest self-examination.

Sign or month?

Scorpio runs October 23 – November 21, which crosses two calendar months — so the zodiac stone and the monthly birthstone may or may not agree depending on your exact date. Neither system overrules the other; the zodiac one is simply older.

Compare against the monthly chart →

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